Tema de Ciencias Naturales. 5º Curso. C.E.I.P. Santa Juliana. Educación Primaria bilingüe. Basado en el Libro de Texto de la Editorial Oxford.Descripc...
Descripción: Natural Science. Level 5. Unit 5. Ecosystems
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NATURAL SCIENCE. 5th LEVEL.
UNIT 3: ECOSYSTEMS. 1. What’s an ecosystem? An ecosystem includes ecosystem includes all of the living and non-living thin things gs in a pat patic icul ula a plac place. e. An ecos ecos! !ste" ste" also also includ includes es the elati elations onship hips s that that e#ist e#ist $et%ee $et%een n those those things. &iffeent places have diffeent ecos!ste"s. A the plac place e %he %hee e a pat patic icul ula a livin living g thin thing g habitat is the lives. An ecos!ste" is "ade up of t%o pats' the biotope and the biocoenosis. biocoenosis. The biotope( biotope( o ph!sical envion"ent( includes all of the non-living things in an ecos!ste"( such as geogaphical elief( soil( light and te"peatue. The biocoenosis includes biocoenosis includes all the living things in an ecos!ste"( such as plants( ani"als and othe oganis"s. The Thee e can can $e "an! "an! diff diffe een entt oga ogani nis" s"s s in an ecos!s ecos!ste" te".. A pop!ation)is pop!ation)is a goup of oganis"s that live togethe and $elong to the sa"e species. A commnity commnity is a collection of diffeent populations that live togethe in one place.
". What a#e t#ophic #e!ationships? The elationships $et%een the oganis"s that eat and the oganis"s that ae eaten ae called t#ophic #e!ationships' #e!ationships' *. +lants ae poduces' the! "a,e thei o%n food. . evi$oes ae pi"a! consu"es' the! feed on plants. /. So"e canivoes ae seconda! consu"es' the! feed on hevi$oes. 0. 1the canivoes ae tetia! tetia ! consu"es' the! feed on seconda! consu"es. 5. &eco"poses' the! $ea, do%n the e"ains of dead oganis"s.
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A $oo% chain sho%s chain sho%s the tophic elationships $et%een diffeent oganis"s. 3. ¿Cómo clasificamos los ecosistemas? Hay muchos tipos de ecosistemas. Para clasificarlos, nos tenemos que fijar en su medio físico. Ejemplos de ecosistemas son: • •
• • •
La charca 2&on%3. &on%3. El bosqu sque 2Woo%!an%3 Woo%!an% 3 (lo estudi estudiare aremos mos más más en profun profundid didad ad como como trabajo de inesti!aci"n#. La costa 2Coast3. Coast3. La pradera 2ai#ie3. ai#ie3. Las ciudades 2City ecosystems3. ecosystems3.
'. What’s the biosphe#e? The bios biosph phe# e#e e 2biosfera3 biosfera3 is all of the ecos ecos! !ste" ste"s s on Eat Eath. h. It incl includ udes es the the oceans( the land( the at"osphee and all the living thing on the planet. A4ITAT 2habitat 2habitat 3' 3' the place %hee a population lives is called its ha$itat. 4I1 4I1E E 2bioma3' bioma3' An ecos ecos!s !ste te" " that that has has seve sevea all t!pe t!pes s of ha$itat is called a $io"e. 4I1S+ERE' The $iosphee is the $iggest ,no%n $io"e. It includes all of the ha$itats on Eath. 5. ¿Por qué cambian los ecosistemas? $on el tiempo, los ecosistemas an cambiando. % eces, estos cambios son naturales, pero en otras ocasiones son causados por la actiidad humana. ¿Cuáles son las causas de los cambios naturales? Los cambios naturales en un ecosistema están causados por ariaciones en las condiciones medioambientales, como cambios estacionales o el desarrollo natural de las comunidades ecol"!icas. ¿Cuáles son las consecuencias de la actividad humana? La polución, polución, la la sobrepesca, sobrepesca, los los incendios forestales o la deforestación son al!unas de las consecuencias que la actiidad humana tiene sobre los hábitats y ecosistemas, lle!ando incluso a su dest destru rucc cci" i"n n tota total. l. Esta Esta dest destru rucc cci" i"n n pued puede, e, incl inclus uso, o, proocar la e&tinci"n de muchas especies.